For the detection of JWH-018 and JWH-073 metabolites in urine. JWH-018 and JWH-073 are the primary synthetic cannabinoid receptor agonists responsible for the euphoric and psychoactive effects that imitate marijuana and are among the numerous compounds found in “herbal” incense or smoke blends.

JWH-compounds are now being sprayed on herbal material and sold as “fake weed” or “synthetic marijuana.” Users looking for a “legal high” often turn to popular herbal smoking products mar­keted under brand names such as K2, K3, Spice, Genie, Smoke, Pot-pourri, Buzz, Pulse, Hush, Mystery, Earthquake, Ocean Blue, Stinger, Serenity and many others.